Air and gas mixer for gas-burners



N. L. AND A. V. TURNER.

AIR AND GAS MIXER FOR GAS BURNERS. APPLICATION FILED mun 1919.

Patented-111110 3, 1919.

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NICHOLAS L. TURNER AND ANTHONY V. TURNER, OF BALTIMORE, MARYLAND.

AIR AND GAS MIXER FOR GAS-BURNERS.

Application filed January 31, 1919.

T 0 all whom it may concern:

Be it known that we, NIoHoLAs L. TURNER and ANTHONY V. TURNER, citizens of the United States, residing at Baltimore city, State of Maryland, have invented certain new and useful Improvements in Air and Gas Mixers for Gas-Burners, of which the following is a specification.

This invention relates to air and gas mixers for gas burners, and has special reference to a novel mixer unit that maybe readily adjusted to obtain a rich or lean mixture according to the particular use of the burner, or on the other hand meet varying gas pressures.

To this end the invention contemplates a device wherein not only the volume of gas flow may be easily regulated, but also the size of the mixing chamber may bevaried as well as the position of the gas supply nozzle changed to obtain the best results under different conditions of use. That is to say, in addition to providing means for regulating the volume of gas flow to control the size of the flame of the burner the present device contemplates means for changing the position of the gas supplying nozzle to meet different gas pressures existing in the main supply line.

A further object of the invention is to provide a simple and practical device which may be readily installed and after being once adjustedto meet the general require ments of the burner with which it is asso ciated, rcquiresno attention except for con trolling the gas flow to regulate the burner flame. This feature renders the device especially useful in connection with heating furnaces or other heating plants since it providos for giving a continuous supply of gaseous fuel of a proper combustible quality without the many inconveniences and annoyances due to the use of coal or fuel in such furnaces.

With the above and other objects in view which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated and claimed.

A preferred and practical embodiment of Specification of Letters Patent.

. Patented June 3, 1919.

Serial No. 274,239.

the invention is shown in the accompanying drawings, in which Figure 1 is a view showing the application of the invention.

Fig. 2 is a perspective view of the improved mixer unit.

Fig. 3 is a vertical sectional view thereof taken on the line 33 of Fig. 1.

Fig. 4 is a detail view of the adjustable nozzle carrier.

Similar reference numerals designate corresponding parts throughout the several figures of the drawings.

In carrying the invention into effect it is proposed to provide a suitable metallic body shell designated generally as 1, the same being preferably of tubular form and closed at one end 2 except for a threaded opening 3 for receiving a pipe 4 or thelike leading to a burner 5. The burner 5 may be of any well known type and size, according to whether it is used in a heating furnace, stove or other like device. Referring further to the tubular body shell 1 it will be observed that the end opposite the wall 2 is open, while the side portion 6 of the shell is preferably provided in its intermediate portion with suitable air intake ports 7 which are. of relatively large capacity, and leave therebetween Web portions 8 of the side wall. The location of the openings 7 with reference to the end wall 2 provides a relatively eapacious mixing chamber 9 within the body shell which insures thoroughand effective mixing of the air with the gas before the same is injected through the opening 3 and into the pipe 4 leading into the burner.

One of the novel and distinctive features of the present invention is the provision of means for varying the size or interior area of the mixing chamber 9 and also altering the position of the injector nozzle which supplies the fuel gas. To this end it will be observed that it is proposed to provide the open end of the body shell 1 with an adjustable nozzle carrying plug 10, the same being slidably fitted within the open end of the body and completely closing the end thereof opposite the wall 2. A set screw 10 may be employed to hold the plug in the desired position. As will be observed from the drawings, particularly Fig. 3, this plug 10 carries the gas supply nozzle 11 and is threaded at one end as at 12 to connect with the gas supply line while the opposite end of the nozzle is provided with an interior bushing 13 having a central discharge orifice 14 which is adapted to be controlled by a needle valve 15 to regulate the flow of gas issuing from the nozzle.

For the purpose of providing a support for the needle valve 15, whereby its manipulating head 16 may be conveniently arranged exteriorly of the body, one of the web portions 8 of the latter may be provided with a longitudinal slot 17 shown in Fig. 2 which accommodates a suitable arm or tongue 18 carried by the plug body 10. As will be noted the slot 17 is open at one end while its other end adjacent the mixing chamber 9 is provided with a rabbeted seat 19 receiving the matching end portion 20 of the arm 18, whereby as the plug 10 is pulled out of the body shell the closed end of the slot will remain covered due to the overlapping engagement of the parts 19 and 20.

The initial position of the plug 10 is that shown in full lines in Fig. 3 of the drawings, wherein the discharge end of the nozzle 11 is slightly to one side of or substantially in the same plane as the edge 7 of the openings '7, and furthermore the longitudinal axis of the jet nozzle is coincident with the axis of the outlet opening 3. Thus, when the needle valve 15 is manipulated to permit gas to flow through the nozzle orifice 14, the force of the gas issuing from the nozzle will cause air to be drawn into the chamber 9 through the openings 7 to form the proper combustible mixture to be injected into the pipe line a leading into the burner. In event that the pressure is unusually high, the plug 10 may be moved out of the end of the body shell a sufiicient distance to bring the dis charge end of the nozzle 11 at any suitable point between the limits of the openings 7, whereby the greater amount of gas supplied by the greater pressure from the nozzle 11 will mix with a correspondingly greater volume of air.

From the foregoing it will be apparent that the present invention provides a mixer wherein the size of the mixing chamber 9 is variable, and also wherein the position of the discharge nozzle 11 is shiftable, to obtain the most eiiicient results. And, in carrying this general idea into effect a novel structure is utilized, the same including a tubular body shell 1 having relatively large intermediate air intake ports 7 and an adjustable nozzle carrying plug 10 in one end,

which plug carries therewith a stand or support having an interlocking engagement with the body shell and also constituting a support or carrier for the needle valve which controls the supply of gas issuing from the injector end of the gas supply nozzle.

lVithout further description it is thought that the many features and advantages of the present invention will be readily apparent to those skilled in the art, and it will of course be understood that changes in the form, pro-portion and details of construction may be resorted to without departing from the spirit of the invention or the scope of the appended claims.

e claim:

1. An air and gas mixer for gas burners including a tubular body relatively closed at one end and open at the other and having its side wall cut away to provide an air intake port, a plug axially adjustable in the open end of the body and a gas supply nozzle-post projecting from the plug, and a radially disposed needle valve also supported from the plug and adapted to control the discharge orifice of the nozzle-post.

2. An air and gas mixer for gas burner including a tubular body having a relatively closed end and an open end, and also having an intermediate air intake port, a plug axially adjustable within the open end, a nozzle-post carried by the plug and having its discharge orifice concentric with the axis of the tubular body, support carried by the plug, and a needle valve carried by said support and adapted to'control the gas passing from the discharge orifice of the nozzle.

3. An air and gas mixer for gas burners including a tubular body relatively closed at one end and open at the other, and having its side walls cut-away to provide air intake ports, said body also having a slot whose open end directed toward the open end of the body and located at one of the web portionsbetween the air intake ports, a plug adj ustably fitted in the open end of the body, a gas nozzle carried bythe plug, an arm also carried'by the plug and fitted in said slot, and an adjustable needle valve carried by the arm and having its needle end projecting diametrically into the nozzle to control the flow of gas issuing therefrom.

In testimony whereof we hereunto aflix our signatures in the presence of two witnesses.

NICHOLAS L. TURNER. ANTHONY V. TURNER. lVitnesses JAMES F. HEALEY,

M. J. MCCARTHY.

Gopies of this patent may be obtained for five cents each. by addressing the Commissioner of Patents, Washington, I). G. 

